Ask Satyam Kumar a questionSign Up to our questions and Answers Engine to ask questions, answer people’s questions, and connect with other people. 👉Note: After Sign Up. A confirmation mail will be sent to your registered email account, If you have not received the confirmation mail, kindly Check Your Spam Mails.
Login to our Questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email. If not received mail yet, please check your spam mails.
Ask Satyam Kumar a questionPlease briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
How does the Reynolds number affect the boundary layer?
The Reynolds number (Re) is a dimensionless quantity that predicts the flow regime (laminar or turbulent) and influences the behavior of the boundary layer: Low Reynolds number (Re < 2000): The flow is laminar, and the boundary layer grows smoothly with distance along the surface. High Reynolds nRead more
The Reynolds number (Re) is a dimensionless quantity that predicts the flow regime (laminar or turbulent) and influences the behavior of the boundary layer:
- Low Reynolds number (Re < 2000): The flow is laminar, and the boundary layer grows smoothly with distance along the surface.
- High Reynolds number (Re > 4000): The flow is turbulent, and the boundary layer is thicker and more chaotic due to increased mixing and eddy formation.
- Critical Reynolds number: For many situations, Re ≈ 2000 is the threshold for the transition from laminar to turbulent flow.
See lessWhat is the role of the boundary layer in drag?
The boundary layer contributes to skin friction drag—the resistance due to the viscous forces in the layer. The drag depends on the velocity profile within the boundary layer, the flow regime (laminar or turbulent), and the surface roughness. A turbulent boundary layer generally produces more drag tRead more
The boundary layer contributes to skin friction drag—the resistance due to the viscous forces in the layer. The drag depends on the velocity profile within the boundary layer, the flow regime (laminar or turbulent), and the surface roughness. A turbulent boundary layer generally produces more drag than a laminar boundary layer due to increased shear stress near the surface.
See lessWhat is the boundary layer separation?
Boundary layer separation occurs when the fluid flow in the boundary layer slows down, becomes unstable, and detaches from the surface. This often happens when there is an adverse pressure gradient (i.e., when pressure increases in the direction of flow). Separation results in a region of recirculatRead more
Boundary layer separation occurs when the fluid flow in the boundary layer slows down, becomes unstable, and detaches from the surface. This often happens when there is an adverse pressure gradient (i.e., when pressure increases in the direction of flow). Separation results in a region of recirculating flow, known as the separated flow zone, which can increase drag and reduce the effectiveness of the surface (e.g., on wings, pipes, or other aerodynamic bodies).
See lessWhat factors affect the thickness of the boundary layer?
The thickness of the boundary layer depends on several factors: Reynolds Number (Re): The boundary layer is thinner at lower Reynolds numbers (laminar flow) and thicker at higher Reynolds numbers (turbulent flow). Flow Velocity: A higher flow velocity leads to a thicker boundary layer, particularlyRead more
The thickness of the boundary layer depends on several factors:
- Reynolds Number (Re): The boundary layer is thinner at lower Reynolds numbers (laminar flow) and thicker at higher Reynolds numbers (turbulent flow).
- Flow Velocity: A higher flow velocity leads to a thicker boundary layer, particularly in turbulent flow.
- Surface Geometry: The shape and roughness of the surface can affect the boundary layer. For example, a smooth surface allows a laminar boundary layer to remain intact for longer, while a rough surface can trigger earlier turbulence.
- Fluid Properties: The viscosity and density of the fluid influence how quickly the boundary layer develops.
See lessWhat are the different types of boundary layers?
Boundary layers can be classified into two main types based on the flow regime: Laminar Boundary Layer: Occurs when the flow is smooth and orderly, with fluid layers moving in parallel. It typically forms at lower flow velocities or in cases with low Reynolds numbers. Turbulent Boundary Layer: OccurRead more
Boundary layers can be classified into two main types based on the flow regime:
Additionally, there is a transitional boundary layer, where the flow shifts from laminar to turbulent
See lessWhat is the no-slip condition in the context of the boundary layer?
The no-slip condition states that the velocity of a fluid in direct contact with a solid surface is zero. This means that the fluid molecules in contact with the surface are at rest relative to the surface, and as you move away from the surface, the velocity gradually increases until it reaches theRead more
The no-slip condition states that the velocity of a fluid in direct contact with a solid surface is zero. This means that the fluid molecules in contact with the surface are at rest relative to the surface, and as you move away from the surface, the velocity gradually increases until it reaches the free-stream velocity of the fluid.
See lessWhat is boundary layer?
The boundary layer in fluid mechanics refers to the thin region of fluid near a solid surface (such as the wall of a pipe, wing of an aircraft, or any other surface over which the fluid flows) where the effects of viscosity are significant. In this layer, the velocity of the fluid changes from zeroRead more
The boundary layer in fluid mechanics refers to the thin region of fluid near a solid surface (such as the wall of a pipe, wing of an aircraft, or any other surface over which the fluid flows) where the effects of viscosity are significant. In this layer, the velocity of the fluid changes from zero at the surface (due to the no-slip condition) to the free-stream velocity farther from the surface.
See lessWhat is the difference between hydrostatic and hydrodynamic pressure?
Hydrostatic Pressure: The pressure exerted by a fluid at rest, due to the weight of the fluid above it. It increases with depth and is given by the formula: P=ρghP = \rho g h where hh is the depth below the surface. Hydrodynamic Pressure: The pressure in a fluid due to its motion (dynamic pressure),Read more
where is the depth below the surface.
- Hydrodynamic Pressure: The pressure in a fluid due to its motion (dynamic pressure), related to the velocity of the fluid. It is part of Bernoulli’s equation.
See lessWhat is cavitation in fluid flow?
Cavitation:- It is the formation of vapor bubbles in a liquid when the local pressure drops below the vapor pressure of the liquid. When these bubbles move to areas of higher pressure, they collapse, creating shockwaves that can cause damage to the surfaces of pumps, propellers, or pipes.
Cavitation:-
It is the formation of vapor bubbles in a liquid when the local pressure drops below the vapor pressure of the liquid. When these bubbles move to areas of higher pressure, they collapse, creating shockwaves that can cause damage to the surfaces of pumps, propellers, or pipes.
See lessWhat is the significance of the drag coefficient?
The drag coefficient (CdC_d) is a dimensionless number that characterizes the drag or resistance a body experiences as it moves through a fluid. It depends on factors such as the shape of the body, flow regime (laminar or turbulent), and the Reynolds number. Lower CdC_d values indicate smoother, morRead more
The drag coefficient () is a dimensionless number that characterizes the drag or resistance a body experiences as it moves through a fluid. It depends on factors such as the shape of the body, flow regime (laminar or turbulent), and the Reynolds number. Lower values indicate smoother, more streamlined shapes, and less resistance.
See less